I’d really like an option to set the scaling factor in the app settings.
Currently I use GNOME on 4K display with 100% scale and 1.25 text scaling factor, and Insync GUI is almost unusable: everything is too small.

It would be great to have an option to set these variables in GUI and apply them on launch.
I know I can just add “QT_SCALE_FACTOR=1.5” to the launch script (/usr/bin/insync), but editing files managed by package manager is not a good idea